cylinder head

American  

noun

1. (in a reciprocating engine or pump) a detachable plate or cover on the end opposite to that from which the piston rod or connecting rod projects.

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cylinder head British  

noun

1. Sometimes shortened to: head.  the detachable metal casting that fits onto the top of a cylinder block. In an engine it contains part of the combustion chamber and in an overhead-valve four-stroke engine it houses the valves and their operating mechanisms

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Etymology

Origin of cylinder head

First recorded in 1880–85

Example Sentences

But the U.S. said Friday that Ford’s fix lets fuel drain from a cylinder head hole to the ground below the vehicles.

From Seattle Times

They’ll also install a tube to drain fuel from the cylinder head and away from hot surfaces.

From Seattle Times

Dealers will also install a tube draining fuel from the cylinder head and away from hot surfaces and check for excessive fuel odor near the top of the engine.

From Reuters

That fall, Richard and his dad took the cylinder heads off, lifted the engine block, removed the pistons, put on new rings, replaced the rods and bearings, adjusted the valves.

From Los Angeles Times

On Nov. 6, a man was injured when he lost his balance and fell on a cylinder head in the engine room.

From Washington Post